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Diodes Incorporated SMBJ120A-13-F
- Part No.:
- SMBJ120A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120A-13-F.pdf
- Description:
- TVS DIODE 120VWM 193VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:78,547
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Product details
Overview
SMBJ120A-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with 120V reverse standoff voltage, 133V minimum breakdown voltage at 1mA test current, and 193V maximum clamping voltage at 3.1A peak pulse current. It provides robust ESD and surge protection for DC power rails and signal lines in industrial power supplies and telecom interfaces.
For engineers reviewing the SMBJ120A-13-F datasheet, SMBJ120A-13-F pinout, SMBJ120A-13-F application, or SMBJ120A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected circuit's absolute maximum rating, peak pulse current capability under 8.3ms half-sine waveform, thermal derating above +25°C, and RoHS-compliant matte tin lead finish compatibility with lead-free reflow.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage transients, triggering when reverse voltage exceeds 120V (VRWM) and fully clamping at ≤193V (VC) within nanoseconds. Its glass-passivated silicon junction ensures stable leakage (<5µA at VRWM) and repeatable breakdown behavior across temperature.
The device uses an SMB package with defined thermal resistance (RθJL ≈ 25°C/W typical), enabling 5.0W steady-state dissipation at TL = +75°C. Pulse derating follows a linear 4.8W/°C slope above ambient, supporting reliable operation in enclosed industrial enclosures up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 8.3ms half-sine surge without failure, suitable for IEC 61000-4-5 Level 4 (4kV/2Ω) compliance. |
| Reverse Standoff Voltage | 120V - maximum continuous DC or RMS operating voltage before significant leakage; sets upper limit for protected line voltage. |
| Breakdown Voltage | 133–153V @ 1mA - tight VBR window ensures predictable turn-on with minimal overvoltage exposure to downstream ICs. |
| Clamping Voltage | 193V @ 3.1A - defines worst-case voltage seen by protected circuit during specified surge; critical for MOSFET gate or controller IC survival. |
| Leakage Current | ≤5µA @ 120V - negligible standby power loss and no measurable impact on high-impedance sensor or reference circuits. |
| Operating Temperature | −55°C to +150°C - supports deployment in automotive engine compartments, outdoor base stations, and industrial motor drives. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case per UL 94V-0, 0.1g weight, matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band (Marked End) | TVS Anode Connection | Connected to ground or low-impedance return path; polarity must be observed for unidirectional operation. |
| Unmarked End | TVS Cathode Connection | Connected to protected line (e.g., +120V rail); conducts surge current to ground when voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| 600W Peak Pulse Power | Enables single-device protection against severe lightning-induced surges (IEC 61000-4-5) without parallel staging. |
| Glass Passivated Die | Ensures long-term reliability and stable VBR drift <±5% over 1000 hours at TJ = +125°C, critical for field-deployed equipment. |
| RoHS & Halogen-Free | Meets EU Directive 2011/65/EU and Diodes Inc.'s "Green" standard (<900ppm Br, <900ppm Cl, <1000ppm Sb), supporting eco-compliance programs. |
| SMB Surface-Mount Package | Offers 30% smaller footprint than SMA while maintaining 5.0W thermal dissipation-ideal for space-constrained 48V/110V telecom modules. |
Applications
| Industrial Power Supply Input Protection | Telecom DC Feeder Line Protection |
|---|---|
Use Scenario: 120VDC input stage of DIN-rail mounted PLC power supply exposed to load dump and induced surges. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between +120VIN and chassis ground, triggered within <1ns upon overvoltage. Use Value: Limits transient voltage to ≤193V, protecting downstream DC-DC controller ICs rated for 200V absolute maximum. |
Use Scenario: -48VDC telecom central office feeder line subject to lightning coupling and switching transients. IC Role / Device Role / Timing Role: Ground-referenced TVS on positive rail, absorbing 600W pulses without degradation over >10,000 events. Use Value: Maintains system uptime by preventing latch-up or burnout in line interface ASICs during repeated surge exposure. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter DC Link |
Use Scenario: 100–130VDC bus in brushless motor drive where IGBT switching causes repetitive dv/dt spikes. IC Role / Device Role / Timing Role: Fast-response clamp suppressing ringing overshoot beyond 120V nominal bus voltage. Use Value: Reduces need for snubber networks and extends IGBT lifetime by limiting voltage stress to <1.6× nominal bus. |
Use Scenario: DC link between PV array and MPPT converter in off-grid solar inverters operating at 120V nominal. IC Role / Device Role / Timing Role: Primary overvoltage protector against grid fault coupling and PV open-circuit transients. Use Value: Achieves >99.9% surge immunity per IEC 61000-4-5 Ed.3, eliminating field returns due to DC-link capacitor failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-E3/52 (Vishay) | Same 120V VRWM, 193V VC, but higher IR (≤10µA vs. ≤5µA) and ±10% VBR tolerance (vs. ±8.3%). | Acceptable in lower-precision power rails; less suitable for ultra-low-leakage sensor front-ends. | Select if cost sensitivity outweighs minor leakage increase and tighter VBR is not required. |
| P6SMB120A (ON Semiconductor) | Identical electrical specs and SMB package, but lead finish is SnPb (non-RoHS) unless specified as "RL" variant. | Not compliant with modern RoHS or green initiatives unless ordered as P6SMB120A-RL. | Choose only for legacy repair or non-regulated markets; verify packaging code for lead-free version. |
Compared with SMBJ120A-13-F, the Vishay part trades tighter leakage control for broader VBR tolerance, while the ON Semiconductor part requires explicit RoHS ordering to match environmental compliance-making Diodes' version the default choice for new industrial designs requiring guaranteed green and precision clamping.
Availability
SMBJ120A-13-F is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom DC feeder line protection, and motor drive DC bus protection requiring stable component supply and full RoHS/halogen-free compliance.
Supply support for SMBJ120A-13-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.
The SMBJ series belongs to Diodes' transient voltage suppression product line, engineered specifically for high-energy surge immunity in industrial, telecom, and automotive power systems where reliability under harsh EMC conditions is mandatory.
FAQ
What is the maximum allowable junction temperature for SMBJ120A-13-F during surge events?
The absolute maximum junction temperature is +150°C. During a single 8.3ms surge, self-heating is transient and does not reach steady-state limits; however, repeated surges require thermal design ensuring average power remains below derated PM(AV) values-e.g., ≤3.0W at TA = +75°C per Fig. 6.
Can SMBJ120A-13-F be used in bidirectional signal line protection?
No-it is a unidirectional TVS diode with cathode band marking. For bidirectional protection (e.g., RS-485, USB D+/D−), use SMBJ120CA-13-F (the 'C' suffix denotes bidirectional construction with symmetrical clamping in both polarities).
Is the SMBJ120A-13-F compatible with lead-free reflow profiles?
Yes. Its matte tin-plated terminals meet J-STD-020 moisture sensitivity level 1 and are qualified for peak reflow temperatures up to 260°C, supporting standard Pb-free SAC305 soldering processes without delamination or voiding.
How does the 193V clamping voltage relate to system-level IEC 61000-4-5 testing?
At 3.1A IPP (corresponding to 4kV/2Ω IEC 61000-4-5 waveform), VC = 193V defines the actual voltage imposed on protected circuitry. To pass Level 4, downstream components must withstand ≥193V for 50ns–100ns, confirming adequate margin above their 200V absolute maximum rating.
SMBJ120A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
SMBJ120A-13-F FAQ
1.How can I place an order for SMBJ120A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120A-13-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ120A-13-F reliable?
The price and inventory of SMBJ120A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ120A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120A-13-F?
SMBJ120A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120A-13-F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ120A-13-F?
For technical support, including SMBJ120A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120A-13-F requirements.
6.How does Aetrix verify that SMBJ120A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ120A-13-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ120A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ120A-13-F?
All SMBJ120A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120A-13-F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ120A-13-F part is unused and in its original packaging.
Return procedure for SMBJ120A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120A-13-F Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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